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* Offering an alternative to apt-key (deprecated) [Use trusted.gpg.d instead of apt-key · Issue #11625 · docker/docker.github.io](https://github.com/docker/docker.github.io/issues/11625) As of Debian 10 / Ubuntu 20.10, apt-key is deprecated and will not be available after Debian 11 / Ubuntu 22.04 Although adding keys directly to `/etc/apt/trusted.gpg.d`/ is suggested by apt-key deprecation message, as per [Debian Wiki](https://wiki.debian.org/DebianRepository/UseThirdParty) GPG keys for third party repositories should be added to `/usr/share/keyrings` and referenced with the `signed-by` option in the source.list.d entry. Providing a binary .gpg key instead of an ASCII Armored one might help shorten the lengthy command by removing the ` | gpg --dearmor ` bit. This removes the software-properties-common provides add-apt-repository which we don't use anymore